wash out vs keep

wash out is not a noun while keep is a noun.

Word	Noun	Adjective	Verb	Adverb
wash out	No	No	Yes	No
keep	Yes	No	Yes	No

As verbs, keep is a hypernym of wash out; that is, keep is a word with a broader meaning than wash out:

wash out: prevent or interrupt due to rain
keep: stop (someone or something) from doing something or being in a certain state

Other hypernyms of wash out include prevent.

wash out (noun)	keep (noun)
	the main tower within the walls of a medieval castle or fortress
	a cell in a jail or prison
	the financial means whereby one lives

wash out (verb)	keep (verb)
deplete of strength or vitality	prevent (food) from rotting
lose color in the process of being washed	prevent the action or expression of
drain off the color in the course of laundering	stick to correctly or closely
remove by the application of water or other liquid and soap or some other cleaning agent	maintain by writing regular records
wear or destroy by the force of water	supply with necessities and support
wash free from unwanted substances, such as dirt	hold and prevent from leaving
prevent or interrupt due to rain	retain possession of
	look after; be the keeper of; have charge of
	retain rights to
	maintain for use and service
	have as a supply
	store or keep customarily
	stop (someone or something) from doing something or being in a certain state
	allow to remain in a place or position or maintain a property or feature
	conform one's action or practice to
	behave as expected during of holidays or rites
	cause to continue in a certain state, position, or activity
	supply with room and board
	maintain in safety from injury, harm, or danger
	fail to spoil or rot
	continue a certain state, condition, or activity
	to rear